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| author | Andrew Kelley <andrew@ziglang.org> | 2019-09-26 01:54:45 -0400 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2019-09-26 01:54:45 -0400 |
| commit | 68bb3945708c43109c48bda3664176307d45b62c (patch) | |
| tree | afb9731e10cef9d192560b52cd9ae2cf179775c4 /lib/std/special/compiler_rt/aulldiv.zig | |
| parent | 6128bc728d1e1024a178c16c2149f5b1a167a013 (diff) | |
| parent | 4637e8f9699af9c3c6cf4df50ef5bb67c7a318a4 (diff) | |
| download | zig-68bb3945708c43109c48bda3664176307d45b62c.tar.gz zig-68bb3945708c43109c48bda3664176307d45b62c.zip | |
Merge pull request #3315 from ziglang/mv-std-lib
Move std/ to lib/std/
Diffstat (limited to 'lib/std/special/compiler_rt/aulldiv.zig')
| -rw-r--r-- | lib/std/special/compiler_rt/aulldiv.zig | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/lib/std/special/compiler_rt/aulldiv.zig b/lib/std/special/compiler_rt/aulldiv.zig new file mode 100644 index 0000000000..d99bc94ff5 --- /dev/null +++ b/lib/std/special/compiler_rt/aulldiv.zig @@ -0,0 +1,55 @@ +pub nakedcc fn _aulldiv() void { + @setRuntimeSafety(false); + asm volatile ( + \\.intel_syntax noprefix + \\ + \\ push ebx + \\ push esi + \\ mov eax,dword ptr [esp+18h] + \\ or eax,eax + \\ jne L1 + \\ mov ecx,dword ptr [esp+14h] + \\ mov eax,dword ptr [esp+10h] + \\ xor edx,edx + \\ div ecx + \\ mov ebx,eax + \\ mov eax,dword ptr [esp+0Ch] + \\ div ecx + \\ mov edx,ebx + \\ jmp L2 + \\ L1: + \\ mov ecx,eax + \\ mov ebx,dword ptr [esp+14h] + \\ mov edx,dword ptr [esp+10h] + \\ mov eax,dword ptr [esp+0Ch] + \\ L3: + \\ shr ecx,1 + \\ rcr ebx,1 + \\ shr edx,1 + \\ rcr eax,1 + \\ or ecx,ecx + \\ jne L3 + \\ div ebx + \\ mov esi,eax + \\ mul dword ptr [esp+18h] + \\ mov ecx,eax + \\ mov eax,dword ptr [esp+14h] + \\ mul esi + \\ add edx,ecx + \\ jb L4 + \\ cmp edx,dword ptr [esp+10h] + \\ ja L4 + \\ jb L5 + \\ cmp eax,dword ptr [esp+0Ch] + \\ jbe L5 + \\ L4: + \\ dec esi + \\ L5: + \\ xor edx,edx + \\ mov eax,esi + \\ L2: + \\ pop esi + \\ pop ebx + \\ ret 10h + ); +} |